Tubing machine



Feb. 15 192?, v. ROYLE I TUBING MACHINE Filed Nov. 21, 1924 INVENTOR ,1;ATTORNEYS r a e F b- 1. .v 9

- 'VE RNON BOYLE, or rn'rnnsomnnw JERSEYQ TUBING MACHINE.

' Application filcddil'ovember 21,.1924. SeriaI No. 751,441

. This invention relates to improvements in tubing machines and, moreparticularly, to.

the construction of the discharge portion. of

bridge and core structure that inclu es-two series of aperturesconcentrically arranged, one withinthe other. i I

' Another object consists in providing a core bridge structure thatincludes apertures through which the material may pass, in addition tothe apertures immediately surrounding the core.

Another object consists in providing a discharge structure for such amachine that includes means for compressing the material after it haspassed the core'bridge and then permitting the same to expand before itreaches the die.

Another object of the invention consists in providing such a structurewhich includes a special form of die and means for adjusting the same.

Another Qobject consists'in providing certain improvements in the form,construction and arrangement of the'several parts whereby theabove namedand other objects may effectively be attained.

A practical embodiment of the invention 1s represented in theaccompanying drawings, in which Fig. l reprcsents a detail front view ofthe discharge portion of a; tubing machine'ernbodying my invention.

Fig. 2 represents a section taken in the plane of the line IIII of Fig.1, looking in the direction of the arrows.

Fig. 3 represents a face view of a core bridge and core, partly-brokenaway.

The front face .of the tubing machine head is denoted bv 1, and it hasthe usual channels 2 for permitting the circulation of a temperaturecontrolling medium, as is well understood in the art.

The said front piece has a bore 3 in which the screw or plodder (notshown) operates in the usual manner. i J

The said bore is reduced in diameter, as indicated at 4, and it is thenenlarged so as to provide a shoulder 5 against which the core bridge isseated, as clearly shown in Fig. 2.

The said core bridge includes an outer member 6 that has a series offive inwardly and radially projecting spokes 7 which. spokes, in turn,support a ring 8 that is' formed integral therewith.

The said ring 8 is shouldered, as shown at 9 and threaded, as indicatedat 10, in order to receive an annulus .11 which has a flange matin isfixed in the ring 6 by a set screw 12.

A set of five spokes 13 project inwardly The outer end of the core isreduced in diameter, as denoted at 17, and slidingly receives an innerdie member 18 which has a with the. shoulder 9 and athread co Uoperatmgwith the thread 10. Thisannulus recess 19 at one end so as to enable thesaid die member to also slide uponthe body of the 1 core 16, as clearlyshown in Fig. 2.

The reduced portion 17 of the core is.

.threaded and carries a nut 20 for adjusting the die member 18on thesaid core.

A port 21 is formed in the front piece 1 and threaded at 22 for thereception of a pipe leading from a suitable source (not' shown) ofnon-adhesive. powdered material,

cates with a peripheral channel 23 formed in the outer circumference ofthe core bridge such as talc. The said port 21 communi member. 6, andsaid" channel 23 is also in communication with ducts 24, two of whichare located in each of the spokes7. The said ducts 24 communicatewith achannel 25 that is formed in the inner periphery of the ring 8 and outerperiphery of the annu- 111511, and said channel 25, in turn,communicates with ducts 26, two of which pass through each of the spokes13... The last named ducts open into a chamber 27 in thehub 14, whichchamber communicates with a longitudinal duct 28., that extends throughthe core 16 from end to end. The arrangement just described enables thenon-adhesive powder to be injected through theport 21 to the interior ofthe tube being extruded threaded into the member 29 holdsthe porand 36are normally heldin their most fortion 31 of the die firmly in place.

The bore of the portion 31 is shouldered, as indicated at 35 to receive,with a tight fit,

the die element 36 wliich constitutes a part of the outer die memberthat immediately coacts with the inner die member 18.

Itwill be seen that the said members 18 ward position with respect tothe tubing machine by the movement of the material being extruded.

Set screws 37 are threaded into the member 29, in radial "disposition,and abut the portion 31 so as to provide means for exactly centering thelatter with respect to the member 29 and to the core 16 and die member18.

By reference to Fig. 2 it will be seen that the interior ofthe member 29is sharply're .duced in diameter in a direction forwardly of' the-corebridge so as greatly to restrict the size of the passage around the coreat this point. This taper is marked 38. Imnjediately forward of thistaper comes a cylindrical portion 39 of quite small diameter, afterwhich the bore of the said member 29 is curved outwardly or flared, soas to increase its diameter to substantially the diameter immediatelyadjacent the core bridge. This flared portion is marked 40. The outerportion-31 of the die matches the portion 40 of the bore of the member29land 1s sha' ed so as to, atflfirst, slightly increase the diameter ofthe opening surrounding v diately adjacent the front face ofthe die andis marked 42.

the core and then gradually, by an inward 5o taper, reduce the sameuntil the, front face of the die'members is ahnost reached. This portionof the bore is marked 41. Imme members the said bore becomes cylindricaland of'a size slightly greaterthan the 'diam;

eter of the inner member 18 of thedie. This portion of the bore isactuallyformed upon the element 36 carried by the portion 31,

The inner die member 18jis taperedfas indicated at 43, so that itsdiameter in-. creases from its .rear endtowards its front I face untilit ap roximates the. front, face,

at whichvtime t e taper is reversed so as proached and actually reached.This taper -on-theimmediate front portion of the member 18 is marked ,44and cooperates with the cylindrical portion 43 on the outer diameter 36to provide means for adjusting the width of the opening between themembers 18 and 36 by sl ding the member '18 longitudinally, one way oranother, on the reduced portion 17 of the core, by means of the nut 20.f

It should be noted that the core 16 has a taper which slightly increasesits diameter opposite the part 38 of the bore of the member '29 and thatit then has an opposite taper which sli htly decreases its diameter inaforward direction until the inner die" member 18 is reached.-

The structure hereinabove described enablesthe material being pushedforward by the screw or plodder to pass through a considerable number ofopenings in the core bridge, which openings are arranged in two circularseries, each opening-in the one series being staggered with respect toadjacent openings in. the other series. This plurality of openings and,additionally, the said arrangement of such openings, serves to break upthe material somewhat and thereby prevent it from passing around thecore and to the die in knotted formation, or other ob jectionableformations in which it frequently I appears immediately at the deliveryend of the screw. Any disadvantage which might result from this breakingup of the material, .mto several streams or ribbons 1s 1mmed1-- compressthe various paits of the materialthat h. ve passed through the corebridge. The in erial thus compressed is maintained in such a conditionwhen passing through the portion 38 of the bore, but it is permitted toexpand when encountering the portion 40 of the bore. and is onlvgradually again compressed-as 'it reaches thedie and is extruded-ffim'the opening thereof. This arrangementallowing for expansion of thematerlal before it reaches the die prevents'itfrom being 'forcled toorapidly; through. the die and-thus. revents the presenceofimperfecvtionsingt e-extruded tubing.

etenofi'ft 'ec'ore;immediately opposite the taperedportion 38. 1'theme'mber 29 cooperates' finfheeompressing of the material at [thisjunc "rej,, already described, while the per. ,of. the .core in theopposite .igradua direction -';forwardly of :said' portion. 38 fa-Icilitates the travel of the material and'its extrusion through thedie.-

-,It wil'l'be understood that variouschanges fliraybe resorted to in theform, construction and arrangement of the several parts,-

- without departing from the spirit and scope of my invention, and henceI do not intend 'The zslilglitjgradual increasein'th'e" diam-v tobelimited to the details herein shown and "described, except as they maybeincluded in the claims.

IVhat I claim is: 1 f 1 I 1. In a tubing machine, a core bridge com:prising a plurality of separate annular members secured together onewithinv the other.

2. In a tubing machine, a core bridge comprising four annular membersone within the other. I I

3. In a tub ng machine, a core bridge comprising a plurality of separateannular meni-v bers concentricall arranged and secured together onewithin the other.

4. In a tubing machine, a core bridge comprising two separable portions,each portion including a pair of. rings connected by spokes, saidportions being secured together one within the other and locked incooperatlve engagement.

.In a tubing machine, a core bridge having a plurality of annular airpassages, said ship.

passages being connected by a plurality of radial ducts arranged instaggered relation- 6. In a tubing machine, a core bridge hav ingaplurality of concentric annular air passages, said passages beingconnected by a plurality of radial ducts arranged in staggoredrelationship. i

7 In a tubing machine, a core bridge comprising, an outer annulus, anintermediate annulus and a central annulus, the outer an nulus beingconnected to the'intermediate annulus by a plurality of spokes, and theintermediate annulus being connected to the central annulus by aplurality of spokes, an

, annular air passage in the outer annulus, an

annular air patsage in the intermediate an-' nulus, a-chamber in thecentral annulus, and ducts 111 said spokes connecting said annularpassages with each other and the annular passage in the intermediateannulus with the chamber.

8. In a tubing machine, a core bridge comprising, an outer annulus,- anlntermediate annulus and a central annulus, the outer annulus beingconnected to the intermediate annulus by a plurality of spokes, and theintermediate annulus being connected to the central annulus by aplurality of spokes,

1 said 5 okes bein arran ed in sta ered reintermed ate annulus beingconnected to the central annulus by a plurality of spokes, an

i s q 1 ,026"

annular air passage inthe intermediateannulus, a'chamber in the centralann ulus,jand a plurality of ducts inindividual spokes connecting saidannular passages with each other and the. annular passage in theintermediate annulus with the chamber.

10.; In a tubingymachine, acore bridge comprising, a plurality.ofseparate annular members concentrically arranged and secured togetherone within the other, said membersbeing connected by a plurality ofradial spokesand provided with annular air passages, and said spokeshaving radial ducts connecting saidannular air' passages.

11. In a tubing machine, a core bridge comprising, a plurality ofseparate annular members concentrically arranged and screw threadedtogether one within the other, said members being connected by aplurality of radial spokes and provided with. annular air passages, andsaid spokes having radial ductsconnecting said annular air passages.

12.;A tubing machine head having a bore through which the material to beextruded may be forced, said bore having a tapered portion whichrestricts its diameter, a cylindrical portion which maintains itsrestricted diameter, and a curved flared portion which expands itsdiameter, when considered in a forward direction. 7

13. A tubing machine head having a bore through which the material to beextruded may be forced, said bore having a tapered portion whichrestricts its diameter, a cylindrical portion whiclnnaintains itsrestricted diameter, a curvedflared portion which expands its diameter,and a" tapered portion which again restricts its diameter, when con-'sidered in a forward direction.

14. A tubing machine head'having a bore 1 may be forced, said borehaving a tapered portion which restricts its diameter, a cylindricalportion which maintains its restricted d'ameter, a curved flared portionwhich ex- 15. A tubing machine head having a bore through whichthematerial to be extruded,

pands its diameter and a tapered portion which again restricts itsdiameter, when con sidered in a forward direction, in combination with acore located in said bore, whichv core is tapered in opposite directionstoward its ends. I 16. A tubing machine head having a bor through whichthe material to be extruded may be forced, said bore being restrictedand 'eter in a forward direction.

17; A tubing machine head having a bore through which the material to beextruded may be forced, said bore being restricted, expanded and aga nrestricted, when considered in a forward direction, in combination witha core located in said bore, which through which the material to core istapered in opposite directions toward its ends, and a die. membermounted on said core, which die member is flared soas to increase itsdiameter in a forward direction.

18. A tubing machine head having a bore may be forced, said bore havinga tapered portion which restricts its diameter, a cylindrical portionwhich maintain; itsrestricted diameter, a curved flared portion whichexpands its diameter,avhen-considered in a forward directicn,.'incombination with a core located in said bore, which core is tapered inopposite directions toward its ends, and a die member mounted on saidcore, which die member is flared so as to increase its diameter in aforward direction.

19. A tubing machine head having a bore through which the material to beextruded may be forced, said bore having a tapered portion whichrestricts its diameter, a cylindrical portion which maintains itsrestricted diameter, a curved flared portion which expands its diameterand 'a tapered portion which again restricts its diameter whenconsideredin a forward direction, in combination with a core located insaid bore, which core is tapered in opposite directions toward itsends,and a die member mounted on said core, which die member is flared so asto increase its diameter in a forward direction.

20. A. tubing machine head having a bore through which the material. tobe extruded may bejjforcechi, said bore being restricted and thenexpanded, When considered'in a forward direction, in combination withaextruded,

core located in said bore, which core is ta pered in opposite directionstoward its ends, and a die member mounted on said core, which die memberis tapered in opposite directions toward'its ends.

21. A tubing machine head having a bore through which the material to beextruded may be forced, said bore being restricted,

expanded and again restricted, when consideredin a forward direction,incombination with a core located 1n said bore, whlch core is. taperedin opposite directions to'wai'd its ends, and" a die member mounted onsaid core, which die member 1s tapered 1n opposite directions toward itsends.

22. A tubing machine head havinga bore through which the material to beextruded may be forced, said bore having a tapered portion whichrestricts its diameter, a cylindrical which expands its diameter, whenconsidered in a forward direction, in combination with a core located insaid bore, which core is tapered in opposite directions toward its ends,and a die member mounted on said core, which die member is taperedinopposite directions toward its ends.

23. A tubing machine head having a bore through which the material tobev extruded may be forced,,said bore having a tapered portion whichagain restricts its diameter, a, when considered 111 21 forwarddirectlon, 1n

combination with a core located in said bore, which core is tapered 1nopposite directlons toward its ends, and a die member mountortion whichmaintains its re-' stricted dlameter, a curved flared portlon 70 ed onsaid core, which die member is tapered 9 in opposite directions towardits ends.

24. A tubing machine head having a bore through which the material to beextruded may be forced, said bore. having a portion adapted to house thescrew, a chamber in 5 front'of said portion and in the rear 'of thebridge location, a tapered portion which restricts the .bore diameter infront of the bridge location, and a curved flared portion which expandsthe bore diameter in front of the tapered portion. p 25. A tubingmachine head having a bore through which the material to be extruded maybe forced, said bore having a portion adapted tofhouse the screw, achamber in front of said portion and in the rear of the bridge location,a tapered portion which'restricts the bore diameter in front of thebridge location, a, curved flared portion which expands the borediameter inlfront of the tapered portion, and a restricted portion ofsubstantially constant diameter between the t apered portion and theflared portion. w v i s 26. A tubing machine head through which thematerial to be extruded maybe forced, said bore having a portion adaptedto house the screw, a chamber in front of said portion .and in the rearof'the having a'bore bridge location, a'tapered portion which restrictsthe. bore diameter in front of the bridge location, and a curved flaredportion which expands the bore diameter'in front of the taperedportion,- the portion ofthe head which includes said tapered and flaredportions being removable.

27. A tubing machine head having a bore through which the material to beextruded may be forced,'said bore having a portion adapted to house thescrew, .a chamber in 1 mamas froht. ofsaid portion and in the rear ofthe bridge location, a tapered portion which re-- 'stricts the borediameter in front of thebridge location',' a curved flared portion'which expands the bore diameter in front of the tapered portion, and arestricted portion of substantially constant diameter between thetapered 'portion and the-flared portion, the portion of the head whichin- 15 29. In a tubing machine, a. coireya die ,cludes said tapered,flared and restricted portions being removabler 28'. In a v tubin ed onsaid core.

, machine, a core, and a" die member slidahly and adjustably mount-.

member. mounted thereon, and means for slidably' adjusting the diemember longitudinally of the core.

30. In av tubing machine, a core having a plurality of diameters. a diemember havdie member being mounted onthe core with its plurality ofinterior diameters engaging the plurality of diameters of the core, and

20 mg a plurality of interior diameters, said Y as my invention, 1 havesigned my name a this 18th da of Nov., 1924., -r .VERuON ROYLE.

